1. Department of Kinesiology and Health Education, University of Texas at Austin, Austin, TX, USA
2. Department of Kinesiology, Tarleton State University, Stephenville, TX, USA
3. Escuela Nacional de Antropologia e Historia, Instituto Nacional de Antropologia e Historia, Mexico
4. Comisión Nacional para el Desarrollo de los Pueblos Indígenas, Mexico
5. Departments of Mathematics, Physics, and Engineering, and Academic Affairs, Tarleton State University, Stephenville, TX, USA